Passengers allowed to use QR codes to enter Shenzhen Metro stations

Passengers have smartphone-generated QR codes scanned by ticket machines before entering Futian Station of Shenzhen Metro in Shenzhen, south China's Guangdong Province, May 8, 2018. Passengers are allowed to use QR codes as electronic tickets to enter all stations of Shenzhen Metro starting from Tuesday. (Xinhua/Mao Siqian)